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(Modeh) I Patefited July 12, 1881.

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UNITED STATES PATENT OFFICE.

CHARLES W. PIERCE, OF OAK HILL, NEW YORK.

ANTI-FRICTION JOURNAL-BOX.

SPECIFICATION forming part of Letters Patent No. 244,294, dated July 12, 1881.

Application filed June 11, 1881. (ModeL) To all whom it may concern Be it known that I, OHARLEs W. PIERCE, of Oak Hill, in the county of Greene and State of New York, have invented new and useful Improvements in Anti-Friction J ournal-Boxes, which are fully described in the following specification.

The object of my invention is to provide a journal-box for grindstones and other axles, combining the very best features for economy of power and durability,and at the same time being cheap in cost and simple to set up for use. For economy of power anti-friction rollers must be used, and for the same purpose and for durability of wear, water anddust must be excluded from the chamber in which the rollers work, and bot-h for cheapness and for the best results in wear the rollers must be fitted to work withoutjournals or axles of their own.

My invention, therefore, consists of an improved journal-box comprising objects or devices both for the securing of ease in the running of the anti-friction rollers and for effectually excluding the dust.

Figure l is partly a side elevation and partly a sectional elevation of an anti-friction journal-box constructed according to my invention. Fig. 2 is a detail in elevation. Fig. 3 is a transverse section of the same.

A represents the lower part of the box, and B the upper and removable part or cover. Both parts have a cavity, 0, surrounding the center space, D, for the axle E, in which cavities the anti-friction rollers F work. Now these rollers, when not fixed on axles of their own, and which it is desirable not to do, on account of the expense and for durability, are free to shift sidewise and hear at their ends against the walls of the box, making unnecessary friction, and this friction increases as the point of such contact varies in distance from the part of the tread or face of the roller which is in rolling contact with the track, to the opposite thereto, so that when the rollers tilt sidewise, and thus touch opposite, or thereabout, to their tread against the side wall of the cavity in which they roll, they create as much or more friction than they avoid. I therefore propose to construct the boxes with the guide rims or ridges G along the an gles of the cavities, so as to make it impossible for the rollers to touch the sides of the cavities, except close to the point of the facecontact of the rollers with the track, where such friction is the least. Such guides are not essential, however, in the upper part of the box, where the rollers carry no weight, except their own and although I have represented them in that part, in this case I may or may not employ them there, as may be found best in practice.

With these rollers and boxes so contrived I provide the extensions H of the cover B, overlapping the ends of the parts A, and having the base-flanges I, and to these extensions, and to the cover, I provide the bead-ribs J, overlapping the top and ends of A, which contrivance is intended to simplify and cheapen the fastening of the boxes to the tim her-bed, and to exclude more effectually water and dust from the interior of the boxes, which is especially important when the bearings are employed for grindstones, for which they are more particularly intended.

Without the extensions H and the baseflanges I the lower parts, A, of the bearings must have base-flanges and bolts to fasten them, and the covers must be separately bolted to the parts A,unless the bolts of covers B also pass down into or through the parts A, which is an awkward contrivance, very undesirable for several reasons.

The extensions H, base-flanges I, and the bead-flan ges J keep the lower boxes, A, in position better than single bolts holdingthe two parts of the box, and at the same time allow the parts A of the box to have a little play, which is sometimes desirable for allowing the shaft and the friction-rollers to work easier than they otherwise would. The bead-flanges J shed off the water and dust along the top of A, and thus protect the bearings much more effectually than they otherwise would.

I am aware that it is commonto make similar flanges upon the ends of journal-box covers to overlap the ends of the lower parts to prevent lateral movement of the covers and to keep the shaft truly centered; but I believe these side-overlapping flanges are new in com bination with the cover and the end extensions H thereof.

I am also aware that a box containing antithe ends of box A, base-flanges I, which bear 1o friction rollers has been provided with guidedirectly on the base-support, and bead-ribs J, ribs G but overlapping both the top and ends of box A,

What I claim is substantially as described.

The combination, in a journal-box contain- 5 ing loose rollers F, which move around the CHARLES PIERCE journal therein, of one or both parts of said WVitnesses: box containing guide-ribs G, and an upper or A. P. THAYER, cap part, B, having vertical extensions Halon g W. J. MORGAN. 

